jrtechs-SteamFriendsGraph/website/src/sigma.export.js

// Hardcoded export for the node.js version:
var sigma = this.sigma,
    conrad = this.conrad;

sigma.conrad = conrad;

// Dirty polyfills to permit sigma usage in node
if (typeof HTMLElement === 'undefined')
  HTMLElement = function() {};

if (typeof window === 'undefined')
  window = {
    addEventListener: function() {}
  };

if (typeof exports !== 'undefined') {
  if (typeof module !== 'undefined' && module.exports)
    exports = module.exports = sigma;
  exports.sigma = sigma;
}